Web address validations in Javascript with Regex

public static bool IsUrl(string Url) { string strRegex = "^(https?://)" + "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" //user@ + @"(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP- 199.194.52.184 + "" // allows either IP or domain + @"([0-9a-z_!~*'()-]+\.)*" // tertiary domain(s)- www. + @"([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // second level domain + "[a-z]{2,6})" // first level domain- .com or .museum + "(:[0-9]{1,4})?" // port number- :80 + "((/?)" // a slash isn't required if there is no file name + "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$"; Regex re = new Regex(strRegex);
if (re.IsMatch(Url)) return (true); else return (false); }